Remarks on a Wiener type pseudodifferential algebra and Fourier integral operators

Remarks on a Wiener type pseudodifferential algebra and Fourier integral operators
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DOI:
10.4310/mrl.1997.v4.n1.a6
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发表时间:
1997
影响因子:
1
通讯作者:
A. Boulkhemair
A. Boulkhemair
中科院分区:
数学3区
文献类型:
--
作者:
A. Boulkhemair

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在[1]中,Sjöstrand引入了包含Hörmander的类s0,0的一般符号类,不涉及任何导数,并允许相关伪微分算子的组合和L有界性。在[2]中,他用Sw表示,并证明了Op(Sw)是一个Wiener代数:如果a∈Op(Sw)在L(L2)中是可逆的,则a−1∈Op(Sw)。让我们回想一下,函数u: R→C在Sw(R)中,如果对于某些χ∈S(Rn)具有非零积分,
In [1], Sjöstrand introduced a general class of symbols containing Hörmander’s class S 0,0, without any reference to derivatives and allowing composition and L boundedness for the associated pseudodifferential operators. In [2], he denoted it by Sw and, among other things, proved that Op(Sw) is a Wiener algebra : If A ∈Op(Sw) is invertible in L(L2), then A−1 ∈Op(Sw). Let us recall that a function u : R → C is in Sw(R) if, for some χ ∈ S(Rn) with non zero integral,